Persistance steps for Cucumber

common_persistance.rb

#Common steps for persisting information
#Copyright 2009 John Miller.  Licensed under the terms of the MIT License.

NOUN_FORMS = '((?:that|those) \w*|the \d+(?:st|nd|rd|th) \w*?|it|I|me|".+?"|the \w* named ".*?")'
IS = '(?:is|are|am)'

Given (/^#{NOUN_FORMS} #{IS} labeled "(.*?)"/) do |noun,label|
  @_labels ||= {}
  @it = get_noun(noun)
  @_labels[label] = @it
end

Given (/^#{NOUN_FORMS} #{IS} named "(.*?)"/) do |noun,name|
  @it = get_noun(element,item)
  @it.name = name
  @it.save!
end

def get_noun(noun)
  case noun
    when /"(.*)"/
      @_label[$1]
    when /(?:that|those) (\w*)/
      instance_variable_get "@#{$1}"
    when /the (\d+)(?:st|nd|rd|th) (\w*)/
      instance_variable_set "@#{$2}",(instance_variable_get "@#{$2.pluralize}")[$1.to_i - 1]
    when "it"
      @it
    when "I","me"
      @me
    when /the (\w*) named "(.*)"/
      #todo Check this
      instance_variable_set "@#{$1}",(Object.const_get($1.capitalize).get(:first, :name=>$2))
  end
end